With its ergonomic shape, the Mystim Rocking Force is the comfiest horse in our stable. The Rocking Force is an ergonimically formed bi-polar e-stim butt plug with cable plugs on the side, allowing for comfortable wear even for longer periods. The butt plug is made of 100% medical-grade platinum silicone. With a vertical separation of the poles, the electrostimulation can be felt directly upon insertion, and the user will have a very happy bottom in no time... Please note: ou will require an e-stim device - like Mystim Tension Lover, or the Mystim Pure Vibes - to activate the poles.